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Clear beads inside a deodorant stick cap can come from condensation, the formula, or both. The pattern becomes more useful when you know where the beads first appeared and whether the stick could have touched the cap.

Start with an empty control

Condition a clean empty pack and a filled pack through the same temperature and humidity sequence. Use the same cap construction, orientation, and opening time. A cool cap surface can collect moisture when it reaches the dew point of nearby air. Beads in both samples support that possibility. A filled pack can also have a different internal humidity or thermal response, so a dry empty control leaves the cause open.

Check the contact path

Photograph the inside of the cap as soon as it is removed. Look for a streak, a matching imprint, or residue directly over the stick edge. Measure the stick height relative to the package reference surface and check the clearance to the cap in the assembled position. Compare upright and inverted samples after the same conditioning. Keep handling consistent so removal of the cap does not create the mark you are investigating.

Record how the mark changes as the sample warms or dries, and compare the residue with a small reference from the actual formula. Appearance and scent are screening observations. If the distinction changes a release decision, have the formula or quality team identify the residue with a suitable method. Include a possibility such as liquid separating from the formula when the filled samples show droplets without a clear contact pattern. The next check can then target storage conditions, cap clearance, or formula behavior. The SamBound packaging catalog is available at sambound.com.

sambound.com
SamBound New Material Technology Company Ltd.

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